Saito 72 muffler question - RCCanada - Canada Radio Controlled Hobby Forum
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Old 06-01-2011, 08:40 PM   #1
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Saito 72 muffler question

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I just bought a lovely new Saito 72 with the new style cast muffler. It came with a 2" long (50mm) exhaust stack that the muffler attaches to. As a result the muffler sticks out rather far from the engine. I guess it will help to keep exhaust goo off the plane but it will look a bit awkward on the Astro-Hog it will be going into.
Is there a shorter stack available, or some combination of headers that will get the muffler closer to the engine? I looked through the Horizon website and didn't see anything obvious. Or is there a reason Saito puts the muffler that far away?

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Old 06-01-2011, 09:01 PM   #2
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Re: Saito 72 muffler question

You should be able to pick up a shorter header without any problem. You could also use an adjustable elbow which threads into the cylinder first and allows your system to be pointed in almost any direction.

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Old 06-01-2011, 09:08 PM   #3
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Re: Saito 72 muffler question

I have a Saito 82 and from what I remember..... the muffler can be screwed in on the threaded pipe a fair bit so it will be closer to the engine. Or if you like, cut the threaded pipe to whatever distance you like.
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Old 06-01-2011, 09:29 PM   #4
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Smile Re: Saito 72 muffler question

Hi John:
I have run into the same problem in trying to tuck the muffler closer in or completely mount it inside the cowl. I have taken the supplied Saito exhaust extension (the one with a slight bend in it) and cut it just ahead of the bend. I bought a metric DIE that is 12mm x 1mm to cut the threads for the end of the pipe where I had cut the pipe. With this method, I was able to make 2 short pieces (one spare).

I have also made my own extensions from standard steel pipe (like 1/4" pipe nipples that were about 4" or 5" long) turned down to 12mm diameter and then cut the treads. Whenever I need a piece, I just cut off what I need. You may not want to go this far, but possibly someone can make this for you.

I have also tried the method of mounting the pipe and stock muffler using an aluminum 90 degree adapter on a Saito 125 only to have the 90 degree adapter break off because the aluminum cannot handle the stock muffler and pipe weight due to normal engine vibration.

I hope some of this info is of some help, but as "William3590" has said, there should be some short ones out there somewhere. At the time I was looking for one, they weren't available a couple years ago or I just couldn't find one.
Wayne Pinke
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Sun Parlor RC Flyers (Windsor, Ont)
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Old 06-01-2011, 10:00 PM   #5
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Re: Saito 72 muffler question

RCSpecialties makes both adapters and different muffler styles:

I've used their 90 degree adapters on both my Saito and OS engines and have never had one come loose or break.
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Old 06-01-2011, 10:05 PM   #6
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Re: Saito 72 muffler question

i am a big time saito fan
but i really hate there new exhaust so i just order the old syle and put them on
Johnny ground pounder !
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Old 06-02-2011, 08:10 AM   #7
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Re: Saito 72 muffler question

Here's a link to a Saito option you should consider, a straight pipe. I've been running these pipes for about 6 years now. It's the pressurized side from the Saito twins. You'll save an ounce of weight and the sound is so realistic. I have one on a 82 and at idle it will blow smoke rings out the pipe. Sometimes the pressure nipple is in a funny spot depending on the angle of the exhaust. The link below will fit from a 72 up to the 115.

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Old 06-02-2011, 09:22 AM   #8
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Re: Saito 72 muffler question

I've used both the old and new exhausts and frankly don't understand why they changed it. The old one was fine and far more discreet, and really these aren't noisy engines.

Just the same congratulations, those are great engines. I had a new Saito 72 also, its a thing of beauty. Might take a while to break it in but it should serve you for many many years. What a great choice for an Astro Hog.
Dean Myers
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